The **Omron K3HB-R** is a high-performance Digital Rotary/Pulse Indicator designed for measuring speed, flow, and cycle time. It belongs to the K3HB series, characterized by its distinctive visual feedback and modular electronic design. --- ### 1. Core Electronic Components & Architecture The K3HB-R consists of several internal electronic layers that allow for high-speed processing and signal conditioning. | Component | Description | | :--- | :--- | | **Microprocessor** | A high-speed CPU capable of sampling pulses at frequencies up to **50 kHz**. | | **A/D Converter** | High-resolution circuitry that converts incoming analog or pulse signals into digital data for display. | | **Input Circuitry** | Supports NPN, PNP, or voltage pulses. It includes internal pull-up/pull-down resistors. | | **Power Supply** | Available in 100-240 VAC or 24 VAC/VDC versions with internal isolation. | | **Modular Slot System** | The rear of the unit has slots for interchangeable output boards (Relays, Transistors, Analog). | --- ### 2. The Display Interface One of the most critical electronic features is the **dual-color LED display**. - **Main Display:** Features a PV (Process Value) display that can change color (Red/Green) based on comparison status (e.g., Green for OK, Red for Alarm). - **Position Meter:** A 20-segment bar graph that provides a visual representation of the measurement relative to the full scale. - **Status Indicators:** LED indicators for HH, H, L, and LL limit status. --- ### 3. Electronic Input Specifications The K3HB-R is specifically tuned for pulse inputs. Its electronic sensing capabilities include: * **Pulse Frequency:** 0.0006 Hz to 50 kHz. * **Input Types:** * No-voltage contacts (Relays/Switches). * Open collector (NPN/PNP). * Voltage pulses (5V, 12V, 24V logic). * **Pre-scaling:** The internal electronics allow for a "Prescale" function, which mathematically converts pulses (e.g., 10 pulses/revolution) into engineering units (e.g., RPM). --- ### 4. Optional Output Modules The electronic versatility of the K3HB-R comes from its **plug-and-play output cards**: | Output Type | Electronic Function | | :--- | :--- | | **Relay G6B** | Mechanical switching for high-current loads (Contact outputs). | | **Transistor** | High-speed NPN or PNP switching for PLC inputs. | | **Linear Analog** | Converts the digital value to 4-20mA or 0-10V DC signal. | | **Communication** | RS-232C, RS-485 (Modbus RTU), or DeviceNet modules. | --- ### 5. Wiring Diagram Overview ```text [ Power Supply ] --- [ (1) - (2) ] (100-240 VAC) [ Pulse Input ] --- [ (B1) - (B3/B4) ] (Signal / Common) [ External Ctrl] --- [ (E1) - (E6) ] (Reset / Bank Selection) ```